Dr Valter Longo - longevity scientist

Dr Valter Longo, director of the Longevity Institute at the University of Southern California talks to me and Rhod Sharp on the BBC's Up All Night, on 5 Live, about periodic fasting and human longevity. We discuss an experimental diet which is part of a study at USC, looking at the effect of fasting. The trial is being conducted under clinical conditions with medical supervision.